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linux/fs/cifs
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Paulo Alcantara f47e3f60f2 smb: client: fix OOB in smb2_query_reparse_point() 
[ Upstream commit 3a42709fa9 ]

Validate @ioctl_rsp->OutputOffset and @ioctl_rsp->OutputCount so that
their sum does not wrap to a number that is smaller than @reparse_buf
and we end up with a wild pointer as follows:

  BUG: unable to handle page fault for address: ffff88809c5cd45f
  #PF: supervisor read access in kernel mode
  #PF: error_code(0x0000) - not-present page
  PGD 4a01067 P4D 4a01067 PUD 0
  Oops: 0000 [#1] PREEMPT SMP NOPTI
  CPU: 2 PID: 1260 Comm: mount.cifs Not tainted 6.7.0-rc4 #2
  Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS
  rel-1.16.2-3-gd478f380-rebuilt.opensuse.org 04/01/2014
  RIP: 0010:smb2_query_reparse_point+0x3e0/0x4c0 [cifs]
  Code: ff ff e8 f3 51 fe ff 41 89 c6 58 5a 45 85 f6 0f 85 14 fe ff ff
  49 8b 57 48 8b 42 60 44 8b 42 64 42 8d 0c 00 49 39 4f 50 72 40 <8b>
  04 02 48 8b 9d f0 fe ff ff 49 8b 57 50 89 03 48 8b 9d e8 fe ff
  RSP: 0018:ffffc90000347a90 EFLAGS: 00010212
  RAX: 000000008000001f RBX: ffff88800ae11000 RCX: 00000000000000ec
  RDX: ffff88801c5cd440 RSI: 0000000000000000 RDI: ffffffff82004aa4
  RBP: ffffc90000347bb0 R08: 00000000800000cd R09: 0000000000000001
  R10: 0000000000000000 R11: 0000000000000024 R12: ffff8880114d4100
  R13: ffff8880114d4198 R14: 0000000000000000 R15: ffff8880114d4000
  FS: 00007f02c07babc0(0000) GS:ffff88806ba00000(0000)
  knlGS:0000000000000000
  CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
  CR2: ffff88809c5cd45f CR3: 0000000011750000 CR4: 0000000000750ef0
  PKRU: 55555554
  Call Trace:
   <TASK>
   ? __die+0x23/0x70
   ? page_fault_oops+0x181/0x480
   ? search_module_extables+0x19/0x60
   ? srso_alias_return_thunk+0x5/0xfbef5
   ? exc_page_fault+0x1b6/0x1c0
   ? asm_exc_page_fault+0x26/0x30
   ? _raw_spin_unlock_irqrestore+0x44/0x60
   ? smb2_query_reparse_point+0x3e0/0x4c0 [cifs]
   cifs_get_fattr+0x16e/0xa50 [cifs]
   ? srso_alias_return_thunk+0x5/0xfbef5
   ? lock_acquire+0xbf/0x2b0
   cifs_root_iget+0x163/0x5f0 [cifs]
   cifs_smb3_do_mount+0x5bd/0x780 [cifs]
   smb3_get_tree+0xd9/0x290 [cifs]
   vfs_get_tree+0x2c/0x100
   ? capable+0x37/0x70
   path_mount+0x2d7/0xb80
   ? srso_alias_return_thunk+0x5/0xfbef5
   ? _raw_spin_unlock_irqrestore+0x44/0x60
   __x64_sys_mount+0x11a/0x150
   do_syscall_64+0x47/0xf0
   entry_SYSCALL_64_after_hwframe+0x6f/0x77
  RIP: 0033:0x7f02c08d5b1e

Fixes: 2e4564b31b ("smb3: add support for stat of WSL reparse points for special file types")
Cc: stable@vger.kernel.org
Reported-by: Robert Morris <rtm@csail.mit.edu>
Signed-off-by: Paulo Alcantara (SUSE) <pc@manguebit.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2024-01-05 15:13:32 +01:00
..
asn1.c cifs: decoding negTokenInit with generic ASN1 decoder 2021-06-20 21:28:17 -05:00
cache.c cifs: remove pathname for file from SPDX header 2021-09-13 14:51:10 -05:00
cifs_debug.c cifs: print session id while listing open files 2023-03-30 12:47:55 +02:00
cifs_debug.h cifs: use SPDX-Licence-Identifier 2021-06-20 21:28:17 -05:00
cifs_dfs_ref.c cifs: use fs_context for automounts 2023-08-03 10:22:29 +02:00
cifs_fs_sb.h cifs: support nested dfs links over reconnect 2022-12-02 17:40:59 +01:00
cifs_ioctl.h cifs: remove pathname for file from SPDX header 2021-09-13 14:51:10 -05:00
cifs_spnego_negtokeninit.asn1 cifs: decoding negTokenInit with generic ASN1 decoder 2021-06-20 21:28:17 -05:00
cifs_spnego.c cifs: spnego: add ';' in HOST_KEY_LEN 2023-11-28 16:56:25 +00:00
cifs_spnego.h cifs: remove pathname for file from SPDX header 2021-09-13 14:51:10 -05:00
cifs_swn.c cifs: remove support for NTLM and weaker authentication algorithms 2021-08-25 15:47:06 -05:00
cifs_swn.h cifs: simplify SWN code with dummy funcs instead of ifdefs 2021-04-25 16:28:22 -05:00
cifs_unicode.c cifs: remove pathname for file from SPDX header 2021-09-13 14:51:10 -05:00
cifs_unicode.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156 2019-05-30 11:26:35 -07:00
cifs_uniupr.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156 2019-05-30 11:26:35 -07:00
cifsacl.c cifs: modefromsids must add an ACE for authenticated users 2022-03-08 19:12:30 +01:00
cifsacl.h cifs: remove pathname for file from SPDX header 2021-09-13 14:51:10 -05:00
cifsencrypt.c cifs: remove pathname for file from SPDX header 2021-09-13 14:51:10 -05:00
cifsfs.c cifs: Fix non-availability of dedup breaking generic/304 2023-12-13 18:36:50 +01:00
cifsfs.h cifs: fix DFS traversal oops without CONFIG_CIFS_DFS_UPCALL 2023-04-05 11:24:59 +02:00
cifsglob.h SMB3: drop reference to cfile before sending oplock break 2023-05-24 17:36:54 +01:00
cifspdu.h cifs: remove pathname for file from SPDX header 2021-09-13 14:51:10 -05:00
cifsproto.h cifs: fix oops during encryption 2023-01-12 11:58:41 +01:00
cifsroot.c cifs: Standardize logging output 2020-06-01 00:10:18 -05:00
cifssmb.c cifs: prevent infinite recursion in CIFSGetDFSRefer() 2023-04-05 11:24:58 +02:00
connect.c smb3: fix problem remounting a share after shutdown 2023-05-17 11:50:23 +02:00
dfs_cache.c cifs: fix return of uninitialized rc in dfs_cache_update_tgthint() 2023-02-06 07:59:00 +01:00
dfs_cache.h cifs: support share failover when remounting 2021-07-22 11:43:23 -05:00
dir.c cifs: Fix xid leak in cifs_create() 2022-10-29 10:12:56 +02:00
dns_resolve.c cifs: remove pathname for file from SPDX header 2021-09-13 14:51:10 -05:00
dns_resolve.h cifs: remove pathname for file from SPDX header 2021-09-13 14:51:10 -05:00
export.c cifs: remove pathname for file from SPDX header 2021-09-13 14:51:10 -05:00
file.c cifs: Release folio lock on fscache read hit. 2023-08-26 14:23:36 +02:00
fs_context.c cifs: mapchars mount option ignored 2023-05-30 13:55:32 +01:00
fs_context.h cifs: sanitize paths in cifs_update_super_prepath. 2023-04-13 16:48:24 +02:00
fscache.c cifs: remove pathname for file from SPDX header 2021-09-13 14:51:10 -05:00
fscache.h cifs: remove pathname for file from SPDX header 2021-09-13 14:51:10 -05:00
inode.c smb3: correct places where ENOTSUPP is used instead of preferred EOPNOTSUPP 2023-10-06 13:18:17 +02:00
ioctl.c cifs: Fix wrong return value checking when GETFLAGS 2022-11-26 09:24:41 +01:00
Kconfig cifs: create a MD4 module and switch cifs.ko to use it 2021-08-25 15:48:00 -05:00
link.c cifs: Fix uninitialized memory read for smb311 posix symlink create 2023-01-18 11:48:49 +01:00
Makefile cifs: decoding negTokenInit with generic ASN1 decoder 2021-06-20 21:28:17 -05:00
misc.c SMB3: Close deferred file handles in case of handle lease break 2023-05-11 23:00:37 +09:00
netlink.c cifs: Constify static struct genl_ops 2021-06-20 21:28:16 -05:00
netlink.h cifs: Register generic netlink family 2020-12-14 09:16:22 -06:00
netmisc.c cifs: remove pathname for file from SPDX header 2021-09-13 14:51:10 -05:00
nterr.c
nterr.h
ntlmssp.h cifs: remove pathname for file from SPDX header 2021-09-13 14:51:10 -05:00
readdir.c cifs: remove pathname for file from SPDX header 2021-09-13 14:51:10 -05:00
rfc1002pdu.h cifs: remove pathname for file from SPDX header 2021-09-13 14:51:10 -05:00
sess.c cifs: Fix xid leak in cifs_ses_add_channel() 2022-10-29 10:12:56 +02:00
smb1ops.c SMB3: drop reference to cfile before sending oplock break 2023-05-24 17:36:54 +01:00
smb2file.c cifs: remove pathname for file from SPDX header 2021-09-13 14:51:10 -05:00
smb2glob.h cifs: remove pathname for file from SPDX header 2021-09-13 14:51:10 -05:00
smb2inode.c cifs: Fix smb2_set_path_size() 2023-03-22 13:31:33 +01:00
smb2maperror.c cifs: cifs_md4 convert to SPDX identifier 2021-08-25 15:51:52 -05:00
smb2misc.c smb: client: fix NULL deref in asn1_ber_decoder() 2024-01-05 15:13:31 +01:00
smb2ops.c smb: client: fix OOB in smb2_query_reparse_point() 2024-01-05 15:13:32 +01:00
smb2pdu.c cifs: do not include page data when checking signature 2023-01-24 07:22:46 +01:00
smb2pdu.h ksmbd: fix wrong name of SMB2_CREATE_ALLOCATION_SIZE 2024-01-05 15:13:31 +01:00
smb2proto.h cifs: remove pathname for file from SPDX header 2021-09-13 14:51:10 -05:00
smb2status.h cifs: remove pathname for file from SPDX header 2021-09-13 14:51:10 -05:00
smb2transport.c cifs: fix check of rc in function generate_smb3signingkey 2023-11-28 16:56:25 +00:00
smbdirect.c cifs: Fix warning and UAF when destroy the MR list 2023-03-10 09:39:32 +01:00
smbdirect.h cifs: smbd: Do not schedule work to send immediate packet on every receive 2020-04-07 12:41:16 -05:00
smbencrypt.c cifs: rename cifs_common to smbfs_common 2021-09-08 23:59:26 -05:00
smberr.h cifs: remove pathname for file from SPDX header 2021-09-13 14:51:10 -05:00
trace.c
trace.h cifs: fix string declarations and assignments in tracepoints 2021-05-27 14:04:32 -05:00
transport.c cifs: Move the in_send statistic to __smb_send_rqst() 2023-03-22 13:31:22 +01:00
unc.c cifs: don't cargo-cult strndup() 2021-04-25 16:28:23 -05:00
winucase.c cifs: remove pathname for file from SPDX header 2021-09-13 14:51:10 -05:00
xattr.c smb3: fix caching of ctime on setxattr 2023-12-08 08:48:04 +01:00